Talk to Ent Specialist on Left Maxillary Sinusitis

respect doctor. I have been suffering from left maxillary sinusitis for almost two years. its been a year when I got severe extreme headache n I was unconscious. I was treated for it but when I left the medicine after the prescribed time it is developing again now. I have been taking steam but my left side of face pains a lot and there is headache too... I also have my nasal septum defected towards left. please help me